I've had this Behringer Xenyx 802USB mixer for ten years now, as you can tell by the dust and dirt.  But like a chump, I kept my mixer flat on the desk and always had to reach over other controls to get to it.   Today I looked at the mixer and said, “Mixer, I'm gonna do a nice thing for you, you have served me so well for a decade” and made this 30-degree angled stand to hold the mixer up to make the controls more accessible. 

I printed this with an A1 Mini, and it's probably be biggest dimension stand I could get on the print bed.  It doesn't hold the mixer all the way up to the back, but it feels pretty secure.  The stand has a big flat bottom so you can command-strip it to a surface if you want it to be more solid.  

It has a 30 mm lip in the front, so it will probably hold up lots of things that aren't a Behringer Xenyx 802USB mixer, but the mixer is what I designed it for.